I also had amplifier problems. Bought a Hsu dual drive system and within 3 years the amp in the Right channel failed. Then a year later the amp in the Left channel failed. And this within a low-demand 2-channel music system (no HT) Hope it works out for you.
Two Channel Music System:
:: GoldenEar Technology Triton One Tower https://www.goldenear.com/products/triton-series
:: Cambridge Audio Azur 651A 75-watt integrated amplifier
:: Cambridge Audio Topaz CD-10 compact disc player
:: Deleted: Hsu Research ULS-15 (x2) DualDrive